fcs/lib/pages/search_page.dart

// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:fcs/model/buyer_model.dart';
import 'package:fcs/theme/theme.dart';
import 'package:fcs/vo/buyer.dart';

import 'buyer_list_row.dart';

Future<Buyer> showPlacesSearch(BuildContext context) async =>
    await showSearch<Buyer>(
      context: context,
      delegate: UserSearchDelegate(),
    );

class UserSearchDelegate extends SearchDelegate<Buyer> {
  @override
  ThemeData appBarTheme(BuildContext context) {
    final ThemeData theme = Theme.of(context);
    return theme.copyWith(
      inputDecorationTheme: InputDecorationTheme(
          hintStyle: TextStyle(
              color: theme.primaryTextTheme.title.color, fontSize: 16)),
      primaryColor: primaryColor,
      primaryIconTheme: theme.primaryIconTheme.copyWith(color: Colors.white),
      primaryColorBrightness: Brightness.light,
      primaryTextTheme: theme.textTheme,
      textTheme: theme.textTheme.copyWith(
          title: theme.textTheme.title.copyWith(
              color: theme.primaryTextTheme.title.color, fontSize: 16)),
    );
  }

  @override
  List<Widget> buildActions(BuildContext context) {
    return [
      IconButton(
        icon: Icon(Icons.clear),
        onPressed: () => query = '',
      ),
    ];
  }

  @override
  Widget buildLeading(BuildContext context) {
    return IconButton(
      icon: Icon(Icons.arrow_back),
      onPressed: () => close(context, null),
    );
  }

  @override
  Widget buildResults(BuildContext context) {
    final buyerModel = Provider.of<BuyerModel>(context);
    return FutureBuilder(
        future: buyerModel.search(query),
        builder: (context, AsyncSnapshot<List<Buyer>> snapshot) {
          if (snapshot.hasData) {
            if (snapshot.data.length == 0) {
              return Container(
                child: Center(
                  child: Text(
                    "Error :No Search Buyer",
                    textAlign: TextAlign.center,
                  ),
                ),
              );
            }
            return Container(
              padding: EdgeInsets.only(top: 15),
              child: ListView(
                children:
                    snapshot.data.map((u) => BuyerListRow(buyer: u)).toList(),
              ),
            );
          } else if (snapshot.hasError) {
            return Container(
              child: Center(
                child: Text(
                  '${snapshot.error}',
                  textAlign: TextAlign.center,
                ),
              ),
            );
          } else {
            return Container(
              child: Center(
                child: CircularProgressIndicator(
                    valueColor:
                        new AlwaysStoppedAnimation<Color>(primaryColor)),
              ),
            );
          }
        });
  }

  @override
  Widget buildSuggestions(BuildContext context) {
    return Container(
      child: Center(
        child: Opacity(
            opacity: 0.2,
            child: Icon(
              Icons.supervised_user_circle,
              size: 200,
            )),
      ),
    );
  }
}